How to Solve VVDI2 Add BMW X1 2019 Key by OBD Fail?

One customer gave feedback that his VVDI2 Key Programmer failed to add key for BMW X1 2019 by OBD. And now BDC module has no communication.
unlock bdc
unlock fail
bdc corrupted
Now BDC module is bricked from "Current key in ignition = NO KEY".

Here is the
Possible Reason:
Unstable or improper voltage during unlocking.

Restore Flash.
Try to unlock in bench with power supply stable at 13.5v.
Try several times until flash writes ok.